asteroids

Describes asteroids, comets, and meteoroids, including what they are and how scientists research them.

Discusses the origin, history, discovery, physical nature, and present and future uses of the asteroids, or minor planets.

Describes comets, asteroids, and meteors.

Describes the location and content of the asteroid belt, the formation and composition of asteroids, and the history of collisions between asteroids and the earth.

Tells all about asteroids, the starlike minor planets that number in the thousands and circle the sun.

Describes what comets, asteroids, and meteors are made of and how they form, explains how scientists study them, and discusses collisions with Earth.

An introduction to the celestial phenomena of asteroids, meteoroids and meteorites, and comets.

Discusses the possibility of the earth being hit by an asteroid or comet, looking at the history of such crashes on the earth, where a cosmic collision is believed to have wiped out the dinosaurs, and studying the recent impact of the comet Shoemaker-Levy 9 on Jupiter in 1994.

Explains how comets and asteroids form, what they are made of, and how they are studied by astronomers, and presents facts on specific comets, asteroids, and meteorites.